And he admitted last night: âSome men like boobs and bums, but I much prefer curvy bodywork.â

Chris, 38, has a recognised psychological condition that makes him physically attracted to motors.

He has had sex with more than 30 different models in 20 years â plus two motorboats and a palâs JETSKI.

Chris, who DOES have a girlfriend, confessed: âA nice car for me is a feast for the senses. Itâs about smells, feelings and tastes. If I see a gorgeous Mercedes I know Iâd love to jump into bed with it.â

His weird obsession mirrors that of electrician Karl Watkins, who The Sun revealed was jailed for having sex with pavements in Redditch, Worcs, in 1993.

Chris has his own website devoted to his bizarre fetish â and claims there are 500 other cranks like him, including women.

But unlike doggers who have sex with strangers in chilly car parks, the motor engineer uses a heated and carpeted double garage at his home for the strange liaisons.

He has met more than 20 people online who have driven their cars over for a service.

Most like to video Chris exhausting himself â while they are pleasuring THEMSELVES.

Chris said: âItâs all about imagination and creativity. Thereâs more to car love than exhaust pipes. Stroking the body panels and delicate touching makes excellent foreplay.â

And he bragged: âI did have the exhausts custom made for one car because they were too small. I had them widened and rounded.

âThe firm never asked why â but I loved the view while she was up on the ramp and they were working on her. I love all aspects of cars. Some people even like to taste mechanical fluids, but thatâs going too far.â

Chris, who lives in the West Country, has made love to top motors including a Bentley Arnage, Porsche and Jaguar XK8.

He has also owned a string of cars that have been the object of his affections â with the latest a black 2.5litre Jaguar X-Type with cream leather upholstery.

Chris writes stories about âauto-eroticismâ on his website and has penned a manual called How To Make Love To A Car.

Experts believe his fetish is the result of a condition called paraphilia, meaning unusual sexual behaviour. They also believe it stemmed from childhood incidents.

Chris said:

At a young age Iâd had a girlfriend or two and as I got older had plenty of other varied partners â cars just happened to be there for me too.
I became really interested in them at 17 when I had the first one I really loved, a blue Peugeot 205 that I called Laura.

Then there was Lydia, a BMW 735i that was tuned and lowered. She was special.

Car lovers vary â a few like to remain faithful to one car all their life, others like to play the car park. Now I donât get as emotionally attached to individual cars as I used to. They are not a substitute for humans. The truth is the opposite.

To be fascinated with any subject you have to be passionate and I love dealing with real people.

Iâve been honest about my fetish with my partners â male and female â and only one girl was jealous. Iâm currently in a long-term relationship and I couldnât be happier.

Chris believes one spark for his fetish was 1980s cult TV series Knight Rider, starring David Hasselhof and featuring a talking car.

He said: âWhen I was a young boy I used to see human qualities in cars. As I grew up I noticed I was having feelings towards cars and they began catching my eye in a certain way.â

Chris saw a psychiatrist when he was 17 and says he was told his fetish was nothing to worry about.

Another expert, forensic psychologist Dr Keith Ashcroft â who specialises in human sexual behaviour â said yesterday: âThis is a very unusual condition.

âBut if you consider how cars are sexualised in modern advertising it is perhaps not a surprise.

âWithin the broad range of sexual activity it is at the extreme edge, but it is not something for which he requires treatment.â